Re: Some comments on "The Mathematical Universe"

From: Bruno Marchal <marchal.domain.name.hidden>
Date: Mon, 20 Jul 2009 21:58:08 +0200

Exercise: criticize the following papers mentioned below in the light
of the discovery of the universal machine and its main consequences
from incompleteness to first person indeterminacy. Think of the
identity thesis. To be sure Tegmark is less "wrong" than Jannes.

Solution: search in the archive of this list where I have already
explained this, or use directly UDA, or wait for what will (perhaps)
follow.

I should send some of my papers on arXiv, but up to now, only
logicians understand the whole "trick", so I have to better
appreciated what physicians don't understand in logic, before making a
version free of references to mathematical logical baggage. Logicians
are not interested in mind, nor really matter, and physicians are
still naïve on the link consciousness/reality, I would say.

To be sure Tegmark is closer than most physicists except perhaps
Wheeler.

Also, Tegmarks' argument for mathematicalism is invalid (even with
strong non-comp axioms). But I prefer to help you to understand this
by yourself through the understanding of what a universal machine is,
than trying a direct argument.

According of the part of UDA (or perhaps AUDA) you understand, you can
already see the weakness of such direct mathematical approach. Note
that comp makes physics much more fundamental, and separate it much
clearly from possible geograpies. Above all comp does not eliminate
the person, which Tegmark is still doing: the frog view is not yet a
first person view, in the comp sense.

Interesting stuff, still. Thanks for the references.

Bruno


On 20 Jul 2009, at 19:44, Brian Tenneson wrote:

> I found a paper that might be of interest to those interested in
> Tegmark's work.
>
> http://arxiv.org/abs/0904.0867
>
> Abstract
> I discuss some problems related to extreme mathematical realism,
> focusing on a recently proposed "shut-up-and-calculate" approach to
> physics (arXiv:0704.0646, arXiv:0709.4024). I offer arguments for a
> moderate alternative, the essence of which lies in the acceptance
> that mathematics is (at least in part) a human construction, and
> discuss concrete consequences of this--at first sight purely
> philosophical--difference in point of view.
>
> -Brian
>
> >

http://iridia.ulb.ac.be/~marchal/




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Received on Mon Jul 20 2009 - 21:58:08 PDT

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